Adolphus s



(No Model.)

' A. S. DENNIS. LINE SPAGING MECHANISM FOR TYPE WRITING MACHINES.

Patented July 19, 1892.

0.. wnsmrwmx o c N'rTnp STATES PATENT I OFFICE.

ADO'LPHUS S. DENNIS, OF DES MOINES, IOWA, ASSIGNOR TO THE DENNIS DUPLEXWRITING MACHINE OOMPANY,OF SAME PLACE.

LINE-SPACING MECHANISM FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 479,352, dated July 19,1892. Application filed October 10, 1891- Serial 110.408.391. (Nomodel.)

To all whom it may concern.-

Be it known that I, ADOLPHUS S. DENNIS, a citizen of the United Statesof America, residing at Des Moines, in the county of Polk and State ofIowa, have invented a new and useful Line-Spacing Mechanism forType-Writing Machines, of which the following is a specification.

My object is to facilitate the movement of a roller as required to movepaper forward to produce spaces bet-ween the written lines and also asrequired to move paper backward on the roller whenever desired.

My invention consists in the construction and combination of levers, apawl, and a detent with a roller and frame, as hereinafter set forth,pointed out in the claims, and illustrated in the accompanying drawings,in which- Figure 1 is an end view of a roller and a portion of a frameupon which it is mounted and to which my device is attached. Fig. 2 is atop View, and Fig. 3 a bottom View, of the same frame and roller and thedifferent parts of my device connected with each other and combined withthe frame. and roller as required for practical use.

A represents the main frame of a machine,

and A the sliding carriage hinged thereto and upon which is mounted aroller A The end of the roller has ratchet-teeth around itscircumference adapted to be engaged by a pawl and detent.

B is the long arm of a bent lever pivoted to the under side of thecarriage-frame A and B is the tubular short arm thereof, and Within saidshort arm is a spring-actuated pawl 0, adapted to engage theratchet-teeth on the end of the roller A in such a manner that when thelever is vibrated it will by means of the pawl impart motion to theroller.

D is a curved lever that has a right-angled extension D adapting it tobe pivoted on top of the carriage-frame A and to extend along theoutside face of the frame.

F is a tube, in which is a spring-actuated detent F carried in such amanner that in its normal position it will engage the ratchetteeth ofthe roller A as required to retain the roller stationary.

F is a curved arm on the outer end of the tube F. Its lower end isperforated and the outer end of the pawl 0 extended through it andprovided with a head 0 The upper end of the arm overlaps the end of theshort arm of the lever D in suchamanner that the tube F and its arm Fand the pawl Ocan be jointly pressed out of engagement with the ratcheton the end of the roller as required to hold the pawl O and detent Fdisengaged therefrom, so that the roller can be turned backward orforward by the direct contact therewith of the operators hand.

G is an adjustable stop device connected with the front face of thecarriage-frame A by means of a set-screw extended through a slot thereinand into a screw-seat in the frame or in any suitable way as required torestrict the motion of the lever B, so that the pawl C will be movedonly from one ratchet-tooth to another at each motion of the lever.

To advance paper on the roller for the purpose of spacing the printedlines as the machine is operated, I simply press the lever B to move it,as indicated by dotted lines in Figs. 2 and 3, and each motion will movethe pawl 0 from one tooth in the ratchet on the end of the roller, andin so doing rotate the roller a fraction of a revolution and advance thepaper thereon a corresponding space. To double the space, two motions ofthe lever are made in succession.

To disengage the pawl O and detent F simultaneously from the roller, Ipress the lever D toward the frame A and then turn the roller by hand asrequired to move the paper backward or forward any distance desired.

I claim as my invention-- l. In a type-writing machine, a device forspacing, comprising a bent lever having a tubular short arm andaspring-actuated pawl in said arm adapted to engage a ratchet on the endof a roller, a tube having a springactuated detent therein adapted toengage the ratchet on the end of the roller, and a curved arm connectedwith the onterend of the pawl in the short tubular arm of the lever, anda lever adapted to engage the curved arm to simultaneously disengage thepawl and the detent from the ratchet on the end of the roller,

[0 with the outer end of the pawl, and a lever pivoted to the frame andits short arm extended under the arm of the detent-carrier, and a rollercarried by the frame, having a circular ratchet on its end,arranged andcombined to operate in the manner set forth, for z 5 the purposesstated.

ADOLPHUS S. DENNIS. \Vitnesses:

J. RALPH ORWIG,

THOMAS G. ORWIG.

